Refactoring: move POM_XML from Maven to Constants

[pascalgrimaud]

Fix #467

[codecov]

Codecov Report

Merging #468 (98b3afc) into main (49df8c5) will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##                main      #468   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       751       751           
===========================================
  Files            143       143           
  Lines           2339      2339           
  Branches          39        39           
===========================================
  Hits            2339      2339           

Impacted Files	Coverage Δ
...tor/buildtool/maven/domain/MavenDomainService.java	100.00% <ø> (ø)
...pster/lite/generator/project/domain/Constants.java	100.00% <ø> (ø)
...hipster/lite/generator/project/domain/Project.java	100.00% <100.00%> (ø)

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